SHAPING FORMER AND SYSTEM FOR BUILDING GREEN-TIRE INCLUDING THE SAME

摘要

A former used for shaping a green tire into a toroidal shape and a green tire building system including two formers are disclosed. The former comprises: a pair of bead-lock devices supported by a rotatable tubular shaft in which a central shaft is disposed; a rotational-to-linear motion converter converting rotational motion of the central shaft relative to the tubular shaft to linear motion for causing the bead-lock devices to come close to each other or to get away from each other; a single electric motor; and a clutch for switching the transmission of the rotational motion of the motor to (A) only the central shaft to change the distance between the bead-lock devices or (B) both of the tubular shaft and central shaft to rotate the bead-lock devices. The building system comprises a turntable on which the two formers are disposed towards different directions so that by turning the turntable, each of the formers positions towards a first drum and a second drum in turn.